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近年来,随着大吨位汽车运输和交通量的迅速发展,半刚性材料的应用越来越广泛。半刚性基层沥青路面强度高,整体性好,能大量利用工业废料,经济效益高,但由于它刚度火、抗拉强度低,容易产生收缩裂缝,导致沥青面层开裂,或者产生车辙,影响行车速度和安全。沥青路面车辙深度的计算和预估是国际上尚未很好解决的难题,各国都在寻求解决这些问题的办法。同济大学、广东省公路管理局等十余个单位共同承担了交通部重点科技项目“半刚性基层沥青路面的研究”,经过几年的研究,已提出了材料的最佳组成设计法及提高早期强度和防裂等一系列成果。科研人员在进行半刚性基层沥青路面的研究中,发现半刚性基层材料的收缩裂缝和材料本身的组成有关。材料组成的不同直接影响到其温度收缩性能、干燥收缩性能及抗裂性能。
In recent years, with the rapid development of large-tonnage automobile transportation and traffic volume, the application of semi-rigid materials is more and more widely. Semi-rigid base asphalt pavement high strength, good overall, can make extensive use of industrial waste, high economic efficiency, but because of its stiffness fire, low tensile strength, prone to shrinkage cracks, resulting in cracking of asphalt surface, or rutting, affecting traffic Speed and safety. Calculation and prediction of rutting depth of asphalt pavement is a difficult problem that has not yet been solved in the world. All countries are looking for ways to solve these problems. Tongji University, Guangdong Provincial Highway Administration, a dozen units jointly assume the Ministry of Communications key science and technology project “semi-rigid grassroots asphalt pavement research”, after several years of research, has proposed the best composition of the material design method and improve the early Strength and crack and a series of results. Researchers in the semi-rigid base asphalt pavement research found that the semi-rigid base material shrinkage cracks and the composition of the material itself. The composition of the different materials directly affect the temperature shrinkage, drying shrinkage and crack resistance.